lldb-netbsd: Implement unwinding of code that caused interruption

Changes: - porting NativeRegisters on x86 64-bit - fix code reading memory from tracee's address space Trace of the following program: int main(int argc, char **argv) { printf("Hello world!\n"); __asm__ __volatile__("int3;\n"); return 0; } $ lldb (lldb) process connect connect://localhost:1234 Process 21323 stopped * thread #1, stop reason = The signal Stopped (signal) was caught frame #0: 0x00007f7f3c800740 -> 0x7f7f3c800740: subq $0x10, %rsp 0x7f7f3c800744: movq %rsp, %r12 0x7f7f3c800747: pushq %rbx 0x7f7f3c800748: andq $-0x10, %rsp (lldb) c Process 21323 resuming Hello world! Process 21323 stopped * thread #1, stop reason = signal SIGTRAP frame #0: 0x000000000040088a -> 0x40088a: movl $0x0, %eax 0x40088f: leave 0x400890: retq 0x400891: addb %al, (%rax) (lldb) c Process 21323 resuming Process 21323 exited with status = 0 (0x00000000) (lldb) Sponsored by <The NetBSD Foundation>
NetBSD · Mar 11, 2017 · 8207a0e · 8207a0e
1 parent 547bcaf
commit 8207a0e
Show file tree

Hide file tree

Showing 6 changed files with 143 additions and 745 deletions.
diff --git a/lldb-netbsd/distinfo b/lldb-netbsd/distinfo
@@ -23,12 +23,12 @@ SHA1 (patch-source_Host_netbsd_ThisThread.cpp) = f0d32c81bc1b8fe9aeb86519ea46ba2
 SHA1 (patch-source_Initialization_SystemInitializerCommon.cpp) = dc270227e68c655753ef5f5168e3fa9a8dab3696
 SHA1 (patch-source_Plugins_Process_CMakeLists.txt) = c689ff4ec455234f8d506dc9eb8e0ed7f750d426
 SHA1 (patch-source_Plugins_Process_NetBSD_CMakeLists.txt) = a77f397020ab752875813a7a93b53ccd3a130e6f
-SHA1 (patch-source_Plugins_Process_NetBSD_NativeProcessNetBSD.cpp) = 64ad94ee859712090bebd1e9dbf79d4add4de448
+SHA1 (patch-source_Plugins_Process_NetBSD_NativeProcessNetBSD.cpp) = 533e215f48d9d5569771082611be3fee059744ec
 SHA1 (patch-source_Plugins_Process_NetBSD_NativeProcessNetBSD.h) = c48bb2dd45682164ab904b8b3f7664b91ac35d5b
-SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.cpp) = d3ba093e776ce3af1a6d6f5f5263e5535f8cdec9
-SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.h) = c9bd447b3a5e70475d1b857c5441a59c7b2a54ba
-SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD__x86__64.cpp) = e937316bee978570c9fe27caa859ba5d35763761
-SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD__x86__64.h) = 58803697f65411d1ad62e45c6af68c9271633bac
+SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.cpp) = c503ae3b197da1c9555e314d17cb88b4ce2b4ba9
+SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.h) = 8c0e41f16445e894a18eee6cae8d3d31ba7c8dd9
+SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD__x86__64.cpp) = 196f33520950262d2ca59f1dc6a019e0ba2e3e7c
+SHA1 (patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD__x86__64.h) = fa3980158bfe07b476c883b2354329dac9eb0c22
 SHA1 (patch-source_Plugins_Process_NetBSD_NativeThreadNetBSD.cpp) = cb8757705327e62273bfe9a84dbdbf9cb9b0751a
 SHA1 (patch-source_Plugins_Process_NetBSD_NativeThreadNetBSD.h) = c675af8495a75f99bb60cb4ab3fa36223f1cb6f4
 SHA1 (patch-source_Plugins_Process_gdb-remote_GDBRemoteCommunicationServerCommon.cpp) = 76e3f6a3e0a24a28a2f5a30e8812906f8a2b2649

diff --git a/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeProcessNetBSD.cpp b/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeProcessNetBSD.cpp
@@ -1,6 +1,6 @@
 $NetBSD$
 
---- source/Plugins/Process/NetBSD/NativeProcessNetBSD.cpp.orig	2017-03-03 15:35:02.252988829 +0000
+--- source/Plugins/Process/NetBSD/NativeProcessNetBSD.cpp.orig	2017-03-11 07:50:19.309994898 +0000
 +++ source/Plugins/Process/NetBSD/NativeProcessNetBSD.cpp
 @@ -0,0 +1,1307 @@
 +//===-- NativeProcessNetBSD.cpp -------------------------------- -*- C++ -*-===//
@@ -1126,7 +1126,7 @@
 +
 +  do {
 +    io.piod_offs = (void *)(addr + bytes_read);
-+    io.piod_offs = dst + bytes_read;
++    io.piod_addr = dst + bytes_read;
 +
 +    Error error = NativeProcessNetBSD::PtraceWrapper(
 +        PT_IO, GetID(), &io);

diff --git a/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.cpp b/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.cpp
@@ -1,8 +1,8 @@
 $NetBSD$
 
---- source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.cpp.orig	2017-03-03 15:35:02.265865750 +0000
+--- source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.cpp.orig	2017-03-11 07:50:19.322535530 +0000
 +++ source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.cpp
-@@ -0,0 +1,111 @@
+@@ -0,0 +1,112 @@
 +//===-- NativeRegisterContextNetBSD.cpp --------------------------*- C++ -*-===//
 +//
 +//                     The LLVM Compiler Infrastructure
@@ -31,7 +31,8 @@
 +    NativeThreadProtocol &native_thread, uint32_t concrete_frame_idx,
 +    RegisterInfoInterface *reg_info_interface_p)
 +    : NativeRegisterContextRegisterInfo(native_thread, concrete_frame_idx,
-+                                        reg_info_interface_p) {}
++                                        reg_info_interface_p) {
++}
 +
 +lldb::ByteOrder NativeRegisterContextNetBSD::GetByteOrder() const {
 +  // Get the target process whose privileged thread was used for the register

diff --git a/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.h b/lldb-netbsd/patches/patch-source_Plugins_Process_NetBSD_NativeRegisterContextNetBSD.h
@@ -1,8 +1,8 @@
 $NetBSD$
 
---- source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.h.orig	2017-03-03 15:35:02.272170791 +0000
+--- source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.h.orig	2017-03-11 07:50:19.328597210 +0000
 +++ source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD.h
-@@ -0,0 +1,76 @@
+@@ -0,0 +1,78 @@
 +//===-- NativeRegisterContextNetBSD.h ----------------------------*- C++ -*-===//
 +//
 +//                     The LLVM Compiler Infrastructure
@@ -60,6 +60,8 @@
 +
 +  virtual void *GetFPRBuffer() { return nullptr; }
 +
++  virtual void *GetDBRBuffer() { return nullptr; }
++
 +  virtual size_t GetFPRSize() { return 0; }
 +
 +  virtual Error DoReadGPR(void *buf);